HERPETOLOGY OF PORTO RICO. 585 



Liietken's IT. antillensis from St. Thomas as a synonym of E. auri- 

 culatus. The former has entirely different proportions, the legs and 

 feet being- much shorter. 



Description ofadvlt.— U.S.N. M. No. 26912, Camp El Yunque, Porto 

 Rico, 2,978 feet altitude; February 24, 1900; L. Stejneger, collector. 

 Tongue narrow, oval, nicked behind; vomerine teeth in two short 

 oblique series some distance behind the choanse, not extending later- 

 ally beyond the latter and strongly converging backward, the interval 

 between them about equaling their distance from the choaine; nostrils 

 much nearer the tip of the snout than the eyes, their distance from 

 the eye nearly equalling the diameter of the latter; upper eyelids 

 nearly as wide as interorbital space; tympanum small, about one-third 

 the diameter of the eye, its distance from the eye equaling the diame- 

 ter; fingers with well-developed disks, first equaling second; disks of 

 toes smaller than those of the fingers; tip of first toe reaching the 

 base of the disk of the second; two moderate metatarsal tubercles; 

 soles smooth except for one or two obscure tubercles; no tarsal fold; 

 the bent limbs being pressed along the side, knee and elbow overlap; 

 hind limb being extended along the side, heel reaches eye; hind limbs 

 being placed vertically to the axis of the body, the heels overlap con- 

 siderably; skin above with scattered granules on back and sides, 

 the eyelids more densely granulated; a very fine, scarcely perceptible, 

 glandular ridge down the middle of the upper surface from tip of 

 snout to vent; belly and posterior half of thighs strongly granular; 

 throat and anterior half of thighs smooth; the belly has no specially 

 differentiated adhesive area or disk. 



Dimensions. 



mm. 



Tip of snout to vent 39 



Width of head Hi 



Diameter of eye 5. 5 



Diameter of tympanum 1.8 



Foreleg from axilla. 23 



Hind leg from vent 58 



Vent to heel 33 



The largest specimens out of 115 collected in Porto Rico (Nos. 

 20! 108-10) measure 13 mm. from tip of snout to vent. 



Coloration of living specimens. —The variation of color presented 

 by this species is simply endless, there being scarcely ever two speci- 

 mens alike, and a detailed description of individuals is therefore use- 

 less. The description of the first adult specimen collected may serve 

 as an example, however, to which I may then append the notes writ- 

 ten down with large series of living specimens before me. 



U.S.N.M. No. 268ST; L. Stejneger No. 9024; Catalina plantation, 

 Porto Rico, about 850 feet altitude; February 21, 1900. — Above 

 dusky fawn color with a very narrow vertebral line, a narrow canthal 



